Okay, I'll post the dummy version of the site instead of the live version simply because you will need to log into the live version:
PV
Note that the issue only presents itself on mobile and tablet devices. Using Chrome's emulator does not show the issue. Browserstack was also less than helpful.
I have pointed out in the below image where the problem dropdown menus are:
http://i.imgur.com/wlrucXj.png
Have at it lads. In the mean time, if anyone has a solution but prefers to be paid for it, please pm me.